Steam platen



STEAM PLATEN Filed Oct. 5. 1928 2 Sheets-Sheet l INVENTOR= F.G. Sohranz,

Jan. 19, 1932. F. e. sssss NZ 1,842,209

Fig.5.

Patented Jan. 19, 1932 ,NIVTED STATES PATENT OFFICE FREDERICK GEORGESGHRANZ, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO O'UTHWARK FOUNDRY &MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA,

A DORPORATION OF PENNSYLVANIA STEAM lPLATEN Application filed October 5,1928. Serial No. 310,467.

or platens bein of relatively thin metal and havinginterna passagesdrilled therein for the circulation of steam or other heating mediumand, in some instances a cooling for connecting suitable pipes to thesaid plates or platens for the introduction and withdrawal of suchheating or cooling medium. In order that such heating medium, whetherliquid or fluid, may be circulated continuously throughout the wholeextent of the platen, the passages therein are in communicationwith eachother and provide a contin- 20 uous or substantially continuous conduit.

Plates of this type are set forth in the patent of R. W. Dinzl, No.1,549,464, dated August 11, 1925, and the patents of H. J.

Ruch, Nos. 1,594,120 and 1,594,121, dated 2 July 27, 1926. In carryingout the improvements forming the subject of my invention, however, I mayemploy any suitable form of plate or platen having interconnecteddrilled passages whereby a conduit, preferablycontinuous, is providedwithin the body of the platen for the circulation of a heating inediumand/or, in some instances, a cooling medium.

The object of my present invention is to provide a steam platen curvedthroughout-its extent, which curvature may extend in a plurality ofdirections, being usually of a compound character; that is to say, theedges of the platens may have one curve or shape, while'th'e centralportion of the platen may be curved on the arc of a circle or otherwiseand such curvature may difiei' from that of the edges of the platen.Such central portion of the platen may be curved in bothdirectionsandcthe curvature in each direction may be -the"same,-ordifferent, as the final shape or condition of the material undergoingpressure may demand. 1' .These and other features of my invention 9' are"more fully described hereinafter, referwhere a heated plate isrequired; such plates medium. For this purpose provision is made encebeing had to the accompanying drawings, in which: Y

Figure 1 is a plan view, more or less diagrammatic, of an ordinarydrilled plate or platen in flat condition.

Fig. 2 is a perspective view of one form of platen, more or lessdiagrammatic, shaped in accordance with my invention.

Figs. 3 and 4 are side and end elevations respectively of the shapedplate shown in Fig. 2, partly in section on the lines III-III andIV-AIV, Fig. 2.

Fig. 5 is a sectional view illustrating dies which may be employed incurving or shaping these platens, in the open position, and

Fig. 6 is a similar view showing the dies in the closed position.

In the preparation or manufacture of various plastic or semi-plastic andother materials in sheet form it is frequently desirable to impart acurvature to the same, which curvature may be in one direction only ormay be a compound curvature extending in both directions wherein thecurves are struck from various centers and wherein the finished productis desired to be arched in both directions, and to have finished andsubstantially polished surfaces. I ropose to prov ide steam plates orplatens or curing these sheets of plastic or other materials whether ofhard rubber, compositions, synthetic resins and/ or other materialswhich, in their finished condition, are to have a curvature which may besimple or compound. For this purpose I propose the development ofsteamplatens of a concavo-convex character or other curvature which, whenarranged in pairs, may be employed to impart the desired curvature tothe sheets of plastic or semiplastic material undergoing heat treatment.

To this end I may take a platen of the character referred to in theseveral patents herein above set forth, or other fiat commercialplatens, having internal "passages, continuous or otherwise, drilledvtherein, and

, place the same between suitable dies whereby medium, may be brought tothe desired curvature.

In the drawings, the plane and otherwise finished platen is indicated at1, Fig. l, and the same platen after curvature has been impartedthereto, is shown in Fig. 2. In the present showing, which is more orless diagrammatic, the four edges, indicated at 1", have curvature whichmay be the same or relatively the same, for opposite edges, while thebody of the platen at its central portion may have a dilierentcurvature, such as indicated at 1 in the sectional views, Figs. 3 and 1.7

In Figs. 5 and 6, I have indicated, diagrammatically, dies between whichthe flat platens may be shaped to the desired curvature, such dies beingindicated at A, B, and any suitable mechanism may be employed forforcing these dies into contact with the platen.

While I have illustrated in the drawings the fact that the lower die issubstantially conveXly curved and the upper die substantially concavelycurved, it may be understood that the relation of the dies may bereversed, without departing from my invention.

It will also be understood that while I tinuous internal conduit for thepassage of a temperature controlling medium.

5. As a new article of manufacture, a concave-convex platen of solidmetal and of'uniform thickness throughout having a continuous internalconduit made up of connected cross passages for the circulation of atemperature controlling medium.

In witness whereof I have signed this specification.

FREDERICK GEORGE SCHRANZ.

have" indicated a substantially regular curvaverse curves; that is tosay, one portion or ,POltlOIlS curved in one general directlon andanother portion orportions curved in another general direction, arewithin the scope of my invention.

I claim:

1. As a new article of manufacture, a metal platen of uniform thicknessthroughout having a plurality of cross bores connected alternately inpairs adjacent opposite edges to form a continuous internal passage forthe circulation of a temperature controlling medium, with its bodycurved in two directions between opposite edges.

2. As a new article of manufacture, a metal platen having a series ofconnected passages forming a continuous internal conduit for thecirculation of a temperature controlling medium, and being curved in aplu rality of directions between opposite edges of the same.

3. As a new article of manufacture, a metal platen having a continuousinternal conduit for the circulation of a temperature controlling mediummade up of a series of connected cross passages, said platen beingcurved in a plurality of directions between opposite edges of the same.

4-. As a new article of manufacture, a concavo-convex platen of solidmetal and of uniform thickness throughout having a con-

